72 Distributor Vacuum Advance Question

[chuck ciaffone <chuckc@ibm.net>]

I've been spending a lot of time lately tuning
and retuning the beast. Last night I pulled the
vacuum advance tube from the manafold to test the
advance mechanism.

When I pulled the tube off the manifold, I could hear the
vacuum, and the revs increased.

When I sucked thru the vacuum tube, while it was
connected to the distributor, nothing happened - no
increase in revs.

Seems reversed to me. What should I be looking for? Neither
Haynes nor Bentley are helpful about this.

Chuck (chuckc@ibm.net OR chuck.ciaffone@wg.com)